measurefs.reiser4(8)

NAME

measurefs.reiser4 - the program for measuring reiser4 filesystem parameters (fragmentation, node packing, etc.).

measurefs.reiser4 [ options ] FILE

measurefs.reiser4 is reiser4 filesystem measure program. You can estimate reiser4 filesystem fragmentation, packingm etc. structures by using it.

-V, --version: prints program version.
-?, -h, --help: prints program help.
-y, --yes: assumes an answer 'yes' to all questions.
-f, --force: forces measurefs to use whole disk, not block device or mounted partition.
-c, --cache N: sets tree cache node number to passed value. This affects very much behavior of libreiser4. It affects speed, tree allocation, etc.

-S, --tree-stat: shows different tree statistics (node packing, internal nodes, leaves, etc)
-T, --tree-frag: measures total tree fragmentation. The result is fragmentation factor - value from 0.00000 (minimal fragmentation) to 1.00000 (maximal one). Most probably, this factor may affect sequential read performance.
-D, --data-frag: measures average files fragmentation. This means, that fragmentation of each file in filesystem will be measured separately and results will be averaged. The result is fragmentation factor - value from 0.00000 (minimal fragmentation) to 1.00000 (maximal one).; Note, that for the fresh filesystem (created not very long time ago) and even fully filled by data, this value will be pretty small.
-F, --file-frag FILE: measures fragmentation of the specified file. The result is fragmentation factor - value from 0.00000 (minimal fragmentation) to 1.00000 (maximal one). Note, that fragmentation of a small file (depends of used tail policy), which consists of tail items, is not very reliable value. That is because, they is always afoot due to balancing.; Examples:; measurefs.reiser4 -F /usr/bin /dev/hda2
measurefs.reiser4 -F /bin/bash /dev/hda2
-E, --show-file: show file fragmentation for each file if --data-frag is specified.

-p, --print-profile: prints the plugin profile. This is the set of default plugins used for all parts of a filesystem -- format, nodes, files, directories, hashes, etc. If --override is specified, then prints modified plugins.
-l, --print-plugins: prints all plugins libreiser4 know about.
-o, --override TYPE=PLUGIN, ...: overrides the default plugin of the type "TYPE" by the plugin "PLUGIN" in the plugin profile.; Examples:; measurefs.reiser4 -o nodeptr=nodeptr41,hash=rupasov_hash /dev/hda2

Report bugs to <reiserfs-devel@vger.kernel.org>

This manual page was written by Yury Umanets <umka@namesys.com>